Oops! It appears that you have disabled your Javascript. In order for you to see this page as it is meant to appear, we ask that you please re-enable your Javascript!



n,n-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid;
n,n-bis(2-hydroxyethyl)taurine; n,n-bis[2-hydroxyethyl]-2-amino-ethanesulfonic acid

Technical Data

CAS Number: 10191-18-1
Molecular Formula: C6H15NO5S
Molecular Weight: 213.25

FabriChem Specifications

Assay (Titration)99% Min.
AppearanceWhite powder
Solubility (0.1M in H2O)Clear & Complete
Moisture1.0% Max.
Pka (25°C)7.1 ± 0.2
UV (1.0M in H2O)
A260 nm0.10 Max.
A280 nm0.08 Max.

Molecular Structure



BES [N,N-bis[2-Hydroxyethyl]-2-amino-ethanesulfonic Acid] is one of the known buffering agents used for biochemical and biological research. These buffering agents are now collectively referred to as “Good’s Buffers”. Good’s Buffers are important tools used in modern biological laboratories for a variety of their properties, including but not limited to being zwitterionic (aka hybrid or dipolar) compounds.